APL3205B datasheet(13/20 Pages) ANPEC

Il numero della parte	APL3205B

Spiegazioni elettronici	Li Charger Protection IC

PDF	20 Pages

Scroll/Zoom	100%

Produttore elettronici	ANPEC [Anpec Electronics Coropration]

Homepage	http://www.anpec.com.tw

Logo

13 / 20 page

Rev. A.3 - Jun., 2011

www.anpec.com.tw

APL3205A/B

Function Description (Cont.)

Figure3. OVP Timing Chart

B(IN)

OUT

ON(OVP)

OVP

POR

FAULT

Powering an Accessory Device

In some applications, such as USB On-The-Go, users need to power an accessory device by using the portable

device’s battery through the jack holes of AC adapter. The APL3205 provide reverse current flow path from OUT to IN.

If V

OUT > VPOR + 0.7V, FET Q1 is turned on, and the reverse current does not flow through the diode but through Q1. Q1

will then remain ON as long as V

OUT > VPOR-VPOR_HYS + RDS_ON*ISUPPLY. Within this voltage range, the reverse current

capability is the same as the forward capability, 1.5A. It should be noted that there is no overcurrent protection in this

direction.

APL3205

Charger

Battery

Accessory

Power Supply

to system

Enable

Disable

Jack

Accessory

Device

Portable

Device

OUT

Gate

Driver and

Logic

Control

ISUPPLY

VOUT

APL3205B Scheda tecnica(PDF) 13 Page - Anpec Electronics Coropration